A true alarum to England, but more especially to the City of London: and a relation of the treacherous combination between errorists and malignants. Also the horrid design which the army and their own party cunningly drive on to change the government of England and inslave the whole kingdom, is briefly declared. A serious discourse held with the citizens of London concerning the covenant that they have taken. Likewise seasonable advice both to the old and young men of the city. By a faithful friend (a mourner in Sion) and very necessary to be taken into serious consideration by all that desire the peace of Jerusalem, the welfare of England, the liberty of the subject, the safety and prosperity of the City of London.